Looking back at some of my old Java code, you can (should?) close both your
query (aka statement) and your connection; so in your code just add the
lines:
st.close();
con.close();
Put that somewhere at then end, in that order, after you've got your return
data set. Close the Statement (and/or PreparedStatement) then close the
Connection. As for in CF, unless your set your queries to cache, I think
they are freed when complete. John Mason did a presentation a while back
about memory management, but I'm not sure what your access would be to the
CF server to be able to change anything in that regard.
Hope that does the trick.
Darin Kohles
Web Application Developer
On Jan 23, 2008 9:36 PM, Dusty Hale <[EMAIL PROTECTED]> wrote:
> I've run into a problem with my VPS server at hostmysite. It seems my
> server gets really low on memory due to database connections that are left
> open (so I'm told by HMS) and HMS recommended this:
>
> ------------------------------------------
> From HMS support:
>
> SQL memory problems like this usually happen because of looping queries,
> or hanging connections. The best solution is to update your code, adjusting
> the queries to close the connection to the database once complete. This will
> ensure that the memory used for the query is then freed.
>
> -------------------------------------------
>
> OK so when I used to do ASP and VBScript I always closed and destroyed the
> database connections and objects. However, I didn't even know there was a
> way to do it with queries in CF. Is this right? Should I somehow be closing
> database connections? In most cases, these are just <cfquery> tags used with
> either <cfloop> or <cfoutput> to display the query results. However, there
> is one area of this site where I used Java inside of <cfscript> to open a
> database connection so I am guessing that may be where I should be closing
> the connection. The code reminds of the way I used to do it with ASP. See
> example:
>
> <cfscript>
> classLoader = createObject("java", "java.lang.Class");
> classLoader.forName("sun.jdbc.odbc.JdbcOdbcDriver");
> dm = createObject("java","java.sql.DriverManager");
> con = dm.getConnection("jdbc:odbc:DRIVER={SQL Server};Database=" &
> application.db_name & ";Server=" & application.dbserver_name & ";",
> application.db_user, application.db_pword);
> qText = "Select * FROM SomeTable";
> st = con.createStatement();
> rs = st.ExecuteQuery(qText);
> q = createObject("java", "coldfusion.sql.QueryTable").init(rs);
> </cfscript>
>
> 1. Ok so I am guessing there is a way to close the connection and destory
> the objects. If so, could someone send me a snippet of code to do that?
>
> 2. I'm not sure if closing a database connection is needed when using
> <cfquery> tags. If so, I've been missing that part for well over 5 years of
> cf coding. Ooops!!! Hope that is not the case.
>
>
>
> -Dusty
>
>
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